Top GOP? LMAO!!! Come on YAX, you got a brain, use it. The reason these GOPs are siding with Democrat is because Trump will not bend to the GOP establishment nor Dem establishment. I can guarantee you that if the Dem put anyone against Trump, these GOPs would do exactly the same thing, back the other person... it's called TDS symptoms.
If Harris was so great... why was Lefties/Demmies so afraid she'll be POTUS if Biden was remove from mental issue? Why didn't she even garnered enough votes to stay relevant during her primary? Why did the Democrat establishments and elites not want a primary but instead just pushed her to the Left/Dem masses? They knew very well that if they had done what Obama wanted, a primary, she would be last.
The only reason they threw Biden under the bus is because he bombed so bad on his first debate and the Lefties/Demmies knew that the world saw how mentally ill he is. Plus all the billionaires/millionaires that donated massively to the Dems threaten to removed their donation if Biden remained on the ballot. They can't sugarcoat or protect him anymore so they threw him out.